<template>
	<div class="child">
		<h1>
			当前的x值是：<span v-big="x"></span>
		</h1>
	</div>
</template>

<script>
	export default {
		name:'Child',
		data() {
			return {
				x:9
			}
		}
	}
</script>

<style scoped>
	.child{
		background-color: skyblue;
		padding: 20px;
	}
</style>